/*
 * Copyright 2011-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sabayframework.cluster;


/**
 * Interface of a node in the super cluster hierarchy.
 * @author Alex Antonau
 * */
public interface Node {

	/**
	 * Return id of the node.
	 * */
	NodeId getId();
	/**
	 * Returns parent id or null if this node has no parent. 
	 * */
	NodeId getParentId();
	
	NodeId[] getChildrenIds();
	
	int getChildrenCount();
	/**
	 * Each parent node must maintain consistent mapping of integer keys 
	 * into children. 
	 * */
	NodeMapping getChildrenMapping();
	/**
	 * Returns execution queue for this node.
	 * */
	NodeExecutionQueue getExecutionQueue();
}
